sdiff: implement the `|` marker for changed lines
Nobody has claimed this yet.
Assessment
- Difficulty
- 3/5
- Estimated time
- 1-2 days
- Newbie friendliness
- 76/100
Research direction
Start in src/side_diff.rs and trace how the current engine diff’s Left, Right, and Both results are consumed. Verify the change with the provided diff -y example, including a hunk with unequal deletion and insertion counts. Done means positional pairs in each contiguous change hunk print with |, while leftovers retain < or > and unchanged lines remain unaffected.
Written by the indexing model from the issue text.
Description
src/side_diff.rs currently emits only <, > and blank gutters. Lines that exist in both files but differ are printed as a separate deletion and insertion instead of a single row with |.
The | is produced at print time, by pairing positionally inside a contiguous change hunk. For a run of N deletions and M insertions, the first min(N, M) are printed as pairs with |, and the leftovers keep < or >. The pairing is positional, so the two lines of a | row need nothing in common:
$ diff -y --width=40 L R # L: a,b1,b2,b3,c R: a,X,c
a a
b1 | X
b2 <
b3 <
c c
So the change is confined to the consumption of the current engine diff's. Buffer the run of Left/Right results, and on the next Both (or at EOF) flush it with the pairing above.
- Dominant language
- Rust
- Stars
- 276
- Forks
- 39
- Avg merge
- 3h 27m
- Merged PRs (30d)
- 3
Contributor guide
First steps
- Read the whole issue, then the project's contributing guide.
- Comment on the issue to say you are picking it up — it saves two people doing the same work.
- Fork the repository and make your change on a branch.
- Open a pull request that references the issue number.
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